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THE RIDFT :analysis

THE RIDFT :analysis. Presented By: Daniel Escobedo Chelsea Armbrister Divyesh Bhakta Brian LaTulip Luis Sura Joseph Gwaltney. Advisors : Dr. Okenwa Okoli Dr. Peter N. Kalu tarik Dickens . Introduction . RIDFT PROCESS . Past Design.

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THE RIDFT :analysis

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  1. THE RIDFT :analysis

    Presented By: Daniel Escobedo Chelsea Armbrister DivyeshBhakta Brian LaTulip Luis Sura Joseph Gwaltney Advisors: Dr. OkenwaOkoli Dr. Peter N. Kalu tarik Dickens
  2. Introduction RIDFT PROCESS
  3. Past Design Symmetric mirror image hydraulic linkage systems .75 Hp DC motor driven 4 -10” stroke hydraulic cylinders Gear and pinion pair (50T, 40T)
  4. Design Issues Total Cost -$14,000 Bulk metal and custom gears Safety Failure to meet OSHA standards Failure in hydraulics and materials not prevented Floor Space Too much “real estate” taken up
  5. RE DEFINITION Voice of Customer
  6. SAFETY RULA- Ergonomic Tool used to Measure Safety of a process
  7. RULA for present Ridft Arm & Wrist Neck, Trunk, & Legs 5 Upper arm Lower arm Wrist pos. Wrist Twist Final Score 3 Neck pos. Trunk pos. Legs 2 4 7 3 1 1 6 5 Posture score Posture Score 0 9 8 0 Muscle use Muscle use Row score Column score 3 3 Force/load Force/load
  8. Theoretical RULA for previous concept Arm & Wrist Neck, Trunk, & Legs 3 Upper arm Lower arm Wrist pos. Wrist Twist Final Score 1 Neck pos. Trunk pos. Legs 2 2 3 1 1 1 2 4 Posture score Posture Score 0 4 2 0 Muscle use Muscle use Row score Column score 0 0 Force/load Force/load
  9. expected RULA for present concept Arm & Wrist Neck, Trunk, & Legs 3 Upper arm Lower arm Wrist pos. Wrist Twist Final Score 1 Neck pos. Trunk pos. Legs 1 2 4 1 1 1 3 2 Posture score Posture Score 0 6 2 0 Muscle use Muscle use Row score Column score 3 0 Force/load Force/load
  10. OSHA Statistical data
  11. ERGONOMIC ARM ANALYSIS Current Ridft ∑Fy = 0Ry + FB -.02W - FD = 0 ∑MA = 0FB(BC) -.02W(BD) - FD(BE) FBicep = 353.3 lb Ry = 325.3 lb
  12. ERGONOMIC BENDING,LIFTING, AND CARRYING ANALYSIS ∑Fx = 0 Rx - Fex = 0; Rx - Fecos(-) = 0 Rx = 626.4lb ∑Fy = 0 Ry - .36W – (.18W+WL) – Fey = 0 Ry - .36W – (.18W+WL) - Fesin (-) = 0 Ry= -735.3 lb (Downward action) ∑MA = 0 -.36W(AB)cos() – (.18W+WL)(AD)cos()- Fey(AC)cos()+ Fex(AC)sin() Fe = (289.1/10.191) = 870.1lb ( Extensor Muscle Force)
  13. Theoretical Ergonomic Analysis
  14. Concept Generation Pros Ergonomically viable lift Portable table lift Cons Lack of Safety Constraints Coil susceptible to brittle fracture Expensive Short coil life
  15. Concept Generation (Cont.) Pros Portable (Swivel Wheels) Adjustable Safety Lock Sturdy Cons No manner of precise placement Two Man Operation
  16. The Trolley
  17. Conclusion problem was redefined new design must be assembled to meet project aims Next phase : DESIGN
  18. Questions
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